By Dr. Gary Pusillo: You can provide the best nutrition for your dog or cat as possible, but without excellent quality air, all your efforts of selecting a food, supplement or treat type, are in jeopardy. Dog and cat breath can be unpleasant some times, but so can the air your pet is forced to breathe each day. At 23,000 to 58,000 breaths per day for cats and 26,000 to 49,000 breaths per day for dogs, air is more important than food! Most American pets look as if they can go months without food, but the absence of oxygen is usually...